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Preadolescent Children Using Real-Time Heart Rate During Moderate to Vigorous Physical Activity: A Feasibility Study

Preadolescent Children Using Real-Time Heart Rate During Moderate to Vigorous Physical Activity: A Feasibility Study

HR was measured using a sport-style chest-worn HR sensor (Garmin HRM-Pro Plus), and HR information was transmitted via Bluetooth Low Energy and displayed on either a smartphone or smartwatch. The smartphone used was a Google Pixel 4 A, selected due to its low cost and the ability of Android phones to sideload apps, allowing us to install the Connexx app on the smartphone.

Lincoln Lu, Danielle E Jake-Schoffman, Hannah A Lavoie, Maedeh Agharazidermani, Kristy Elizabeth Boyer

JMIR Hum Factors 2025;12:e58715

Comparing Self-Reported Running Distance and Pace With a Commercial Fitness Watch Data: Reliability Study

Comparing Self-Reported Running Distance and Pace With a Commercial Fitness Watch Data: Reliability Study

More advanced participation involved connecting participants’ Garmin Connect (Garmin Ltd) data, which included sharing data on running distance, running speed, and heart rate during each training or racing session. Participants added their Garmin Connect information at study recruitment. Garmin data were then automatically uploaded every week when the participant was within the study.

Garrett Bullock, Joanne Stocks, Benjamin Feakins, Zahra Alizadeh, Amelia Arundale, Stefan Kluzek

JMIR Form Res 2024;8:e39211

Reliability and Validity of Commercially Available Wearable Devices for Measuring Steps, Energy Expenditure, and Heart Rate: Systematic Review

Reliability and Validity of Commercially Available Wearable Devices for Measuring Steps, Energy Expenditure, and Heart Rate: Systematic Review

Apple Watch was within ±3% 71% (35/49) of the time, while Fitbit wearables were within ±3% 51% (36/71) of the time and Garmin wearables were within ±3% 49% (23/47) of the time. Despite similar ±3% measurement error rates, Fitbit appeared to underestimate heart rate more than Apple Watch and Garmin. For energy expenditure estimates, no brand of wearable was within ±3% measurement error more than 13% of the time (Figure 5).

Daniel Fuller, Emily Colwell, Jonathan Low, Kassia Orychock, Melissa Ann Tobin, Bo Simango, Richard Buote, Desiree Van Heerden, Hui Luan, Kimberley Cullen, Logan Slade, Nathan G A Taylor

JMIR Mhealth Uhealth 2020;8(9):e18694

Validity Evaluation of the Fitbit Charge2 and the Garmin vivosmart HR+ in Free-Living Environments in an Older Adult Cohort

Validity Evaluation of the Fitbit Charge2 and the Garmin vivosmart HR+ in Free-Living Environments in an Older Adult Cohort

Garmin vivosmart HR+ (Garmin, Olathe, KS, USA): a wrist-based device that monitors heart rate, calories burned, intensity of fitness activities, distance, time, and pace for indoor or outdoor activities.

Salvatore Tedesco, Marco Sica, Andrea Ancillao, Suzanne Timmons, John Barton, Brendan O'Flynn

JMIR Mhealth Uhealth 2019;7(6):e13084